Liquid cooler



Sept. 16, 1952 J. L.; BARR 2,610,485

LIQUID COOLER Filed July 28, 1950 2 SbiEETS--Sl-IEET 1 Illu! I.II.....|. .I l

INVENTOR.

J, L.. BARR LIQUID COOLER sepL 16, 1952 2, Sl-iEETS-Sl-iEET 2 Filed July 28, 1950 INVENTR.

Patented Sept. 16, 1952 l LIQUID COOLER y John L. Barr, Baltimore, Md.

Application July 28, 1950, Serial No. 176,482

3 Claims. 1

My invention relates to a cooler for any and all kinds of liquids, beverages, heavy fruit juices, chemicals, and water.

One of the several objects of this new and improved cooler is easy and quick cleaning in case of a change from one kind of liquid to another.

Another object of this cooler is in the economic use of the refrigerating medium used for the operation o-f this cooler. The small areas in the center evaporator holds a small amount of refrigerant, thus being economical because of the. high cost of some types of refrigerants that are non toxic and can or must be used in many localities.

As cooling is the principal object in this case, liquidsr or beveragescan be cooled to their lowest temperature in liquid state. Slight freezing or congealing by cold will not injure the cooler.

This feature is not found in the general tubular coolers.

The refrigerant enters the center evaporator at the bottom and flows upward to near the top of the evaporator thence downward to the bottom and out thru a pipe to the suction coil which is wrapped tightly around the outside of the cooler. The refrigerant suction leaves the 130D of thesuction coil to go to the refrigerating condensing unit.

Another tank is placed around the suction coil and around 4it is placed insulation material with a sheet metal finish around the outside. Cooler is supported on floor by four legs.

The cooler can be operatedon -a refrigerant flooded system. This feature makes the cooler more efcient than by the use of a direct expansion system of refrigerating. The cooler can be operated on ay direct expansion system, but with less eiliciency. .i

The suction coil or coils are wound tightly together and a small amount of eutectic fluid such as glycerine and water at a low freezing point isv lled in the voids between lthe coils of pipe. This is for the purpose of a better contact between the coils and cooler tank. Glycerine and water is a non-poisonous fluid. The entire cooler can be of welded and brazed construction.

Other objects will become apparent as the invention is more fully set forth.

To make this invention clear, reference is made to the appended drawings, in which a partticular form of the invention is indicated. n

These drawings, with the following description, outline the particular form by way of example, illustrate its principles and portray its objects. At the same time, the claim-s emphasize the scope of the invention.

. 2 Referring to the drawings: f Figure 1 is a sectional view in plan of a cooler used in this embodiment of the invention looking along line I g-AI of Figure 2; j

Figure 2 isa sectional view taken along the line 2-2 in a longitudinal direction, of Figure 1;

Figure 3 is a section of the center evaporator, taken on line 3-3 of Figure 4;

Figure 4 is partial bottom view of cooler showing the refrigerant pipe connections. A

Similar reference Vcharacters refer to similar parts throughout the drawings.

In the structure shown in Figures r1 and 2 a cooler consisting of a casing 5 has a removable dished cover 6. Over this is an insulated cover 1. This cover is insulated at 8 with a holding plate 9, this plate is securely fastened in place by welding or other means to the cover 'I and leaves a space I0 between covers as indicated. Cylinder casing 5 is welded to top plate II, said casing 5 is also welded to bottom plate I2. Top plate I'I and bottom plate I2 are both round and with side wall 5 form the cooler tank. The center evaporator I3 of which a complete description is given on detail Figures 3 and 4.

The refrigerant suction coil I4 is wound tightly against the tank wall 5 and also wound close together vertically so that each'pipeis against each other making a solid coil. This pipe coil is connected at bottomv with a fitting I5 having a drain connection I6 at the bottom. vFrom this fitting a pipe I'I and L I8 connects to bottom of evaporator I3. The refrigerant suction coil I4 extends thru tank bottom I2 and is brazed or welded to same to make a tight joint.` Another shell' I9 is placed around outside of refrigerant suction coil I4 and Welded to top head I I Vand bottom plate I2. thus making a liquid tight space 20 in which coil I4 is located.

The liquid to be cooled, large Volume space 2|', is located between shell 5 and evaporator I3. The insulation 22 of high heat resisting material such as cork, fibre glass or similar material is held in place by a sheet steel casing 23. Refrigerant suction coil leaves the cooler shell I9 at top outlet 24 and is brazed or welded in place. The space 20 is lled with eutectic fluid made from glycerine and Water or other non-toxic and non-poisonous low temperature fluid. The liquid to be cooled enters the cooler thru inlet 25 and ilows upward thru refrigerated tube 26 and spills over in space 2 I, thence downward and out thru outlet pipe 21. Connection 28 at bottom of tube 26 can be used for either a drain or as a circulating inlet. as certain liquids to be cooled can be recirculated,

3 thereby increasing the capacity of the cooler. A more complete description of the center evaporator I3 as shown in Figures 3 and 4 is as follows: the outside shell I3 is welded to a top plate 29 and 'also to another top plate 3U. A copper plate 3l is placed between plates 29 and 30. Shell I3 is welded to a bottom plate 32. Shell 33 is welded to bottom plate 32 and open at top thus forming space 34. Shell 35 is also welded to bottom plate 32 'and extends thru plate 32 and is welded to Aranother plate 39, this shell forms space 3S and with shell 33 forms space 38. Center tube 26 is welded :at top to sheets 29 and 30 and also to bottom s heets 39 and 40. This forms the cooler inlet pipe 28 and also can be a circulating connection. Refrigerant outlet connection I8 connects to refrigerant suction coil I4. Center tube 26 is open at the top. The bottom plate of cooler body I2 is' welded to evaporator shell I3.

Refrigerant liquid inlet 4I is welded in shell I3. Refrigerant liquid inlety 42 is welded in shell 35. v W

Legs n43, Figure 2, are cooler supports.

Having thusv described the invention, what I claimis:

l. A heat exchanger for cooling liquids. co l-- prising an outer casing, a cylinder within said casing and spaced therefrom, with insulating means between said cylinder and casing, a cen-1 trally perforated bottom plate for said casing, also a top plate with a central hole, a shell within said cylinder and spaced therefrom, a pipe coil in space between Vthe cylinder' andv shell, voids between the cylinder shell and pipe coil to be lle'd with a eutectic uid, a second shell inwardly spaced with a cover this space to receive a liquid to be cooled, a third shell' inwardly spaced with open top end for coolant, a fourth shell inwardlyv spaced with open top to receive coolant"gas, a fifth shell open at top and bottom, space between fourth and fifth shells for coolant, center area of fifth shell for inlet of liquid to be cooled, an outlet for the cooled liquid located in bottom plate between first and second shells, one coolant liquid inlet enters the second shell near the bottom, another coolant liquid inlet enters the fourth shell near thebottom, a` coolant pipe connection from bottom plate between third and fourth shells to' the bottcmof the pipe coil, a'coolant vgas 'outletat top.Y of. pipe coil. f Y 2. 'A heat exchanger for cooling liquids comprisingn an outer casing, a cylinder within said casing4 and spaced `therefrom, withv insulating means between said ncylinder and casing, a centrally vperforated 'bottom plate forfsaid casing, also a top plate with acentral hole, a sh'ellw'ithf in'said cylinder and spaced therefrom,` a pipe coil in'space between the cylinder and shell, voids 4 between the cylinder shell and pipe coil to be filled with a eutectic fluid, a second shell inwardly spaced with a cover; this space to receive a liquid to be cooled, a third shell inwardly spaced with open top end for coolant, a fourth shell inwardlyspaced with open top to receive coolant gas, a fth shell open at top and bottom, space between fourth and fth shells for coolant, center area of Afifth shell for inlet ofl liquid to be cooled; means for supplying a cooling medium to the second and fourth shells and pipe coil and means for withdrawing. cooling medium therefrom; means for supplying a liquid to the fifth shell and space between second and first shells and means for withdrawing cooled liquid therefrom.

3. A heat exchanger for cooling liquids com-- prisingan outer casing, a cylinder within said casing and spaced therefrom, with insulating means between said cylinder and casing, a centrally perforated bottom plate for said casing, also 'a top plate with a central hole, a shell within said cylinder and spaced therefrom, a pipe coil in space between the cylinder and shell, voids between the cylinder, shell and pipe coil to be filled with a eutectic fluid, a second shell inwardly spaced with a cover; this space to receive a liquid to be cooled,`a third shell inwardly spaced with open top'end for coolant, a fourth shell inwardly spaced with open top to receive coolant gas, a

fifth shell open at top and bottom, space between fourth and fth shells for coolant, center area of fth shell for inlet of liquid to be cooled; means for supplying a coolingv medium to the second and fourth shells and pipe coil and means forwithdrawing cooling medium therefrom; means for supplying a liquid to the fth shell and space between second and rst shells and means for withdrawing cooled liquid therefrom: means for supplying a cooling medium to the second and vfourth shells and pipe coil; means for supplying a vliquid to the fth' shell and space between second and first shells; cooling-medium enters at bottom of second and fourth shells and travels upward to top thence downward between third and fourth shells and out through pipe coil, thus forming counterow to liquid to be cooled.

J OHN L. BARR.

`:aFERENCES CITED The lfollowing references areV of record in the le of this patent:

" U'NiTED s'rATEs- PATENTS Number. Name Date 695,041v Fues Mar. 11, 1902 2,367,149 SmithA Jan. 9, 1945 2,517,773 Doughty Aug. 8, 1950 2,532,328 Penning Dec. 5,1950 

